Stone-cutting machine.



Patented Mar; 23, 1909.

2 SHEETS-SHEET 1.

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E. A. CHASE. STONE OUTTING MACHINE. APPLICATION FILED JULY3, 1908.

Patented Mar. 23, 1909.

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Elvwzwioz UNITED sTAri'Js- A ENT oFFroEt.

ELRO r A.. onAsn, or Non'rnrmLo, VERMONT, AssIcN oR or oNE-HALrTo AMOS F, LANiER,

or NORTHFIELD, VERMONT.

m-cucr'rmc MAorimE.

Specification of Letters Patent. Patented March 23, 1909.

Application filed July 8, 1908. Serial No. 441,837.

To all whom it may concern:

Be it known that I, ELROY A. CHAsE, a citizen of the United States of America, residing at Northiield, in'the county of Washington and State of Vermont, have invented 1 erat(- easily' and by the use of which large blocks may be divided in a tion and with a clean cut.

The invention consists in certainnovel features of the apparatus illustrated in the accompanyin drawings as will be hereinafter first ful y described and then particularlypointed out in the claims.

\ section taken through one of t e cutters and .tndinally In the drawings, Figure 1 is a side eleva-- tion, with parts in section, of a'macl'iine cm bodylng the invention; Pig. 21s a plan View of a part of the apparatus, hi 3 1s a detail its shaft, and Fig; 4 is a detail perspective view-of one of the cutters and its cutter head.

In carrying out this invention, a track, 1, and a series of cars, trucks, or drays, 2, mounted on the track are employed. At a convenient point, a'frame, 3, is erected to bridge the track andsupport the cutters and the operating mechanism, the cross beams of the frame cing at such a height as to clear the trucks and the stones carried thereon. Upon the frame are a pair of inclined longidis )osed boards, 4, upon the upper sides of which are a series of journal boxes, 5, in which are mounted shafts, 6, carrying outter heads, 7 at their'inner ends, the parts being so located that the blades, 8, carried by said heads will be disposed along the medial longitudinal line of the apparatus. The blades or cutters, it will be noticed, consist of long narrow steel plates and are held against the flat inner faces of the cutterheads by means of clamping pl ates, .9, and bolts or other suitablefastenings, 10, inserted through the said clam ing plates into the cutter e observed that as the cutter heads. It will heads are carried by the inner ends of the shafts 6 and the shaftsare mounted u on theinclined beams, thecu'tter heads wil he arranged so=that each one will be higher than the one following it with the result thatthe cutters or blades likewise form au i s locks and its continuous operaclined series tb act on the block vancces sively.

The lower ends of the clampin plates are all arran ed invalpproximately t e same hori' zonta plane so as to clear the upper side of the block of stone beingcut' and the lower edge of each i te forms an are so that it will not be broug t into contact with: the stone as it vibrates. Tlie upper ends of the clamping plates are carried up above the pivotal point of thecutterihead so as to securely clamp the blade and assure, the oscillation of the same. This arrangement provides an extended bearing for the initial cutter which requires the most rigid gholding while the succeeding cutters which cut dee er in the stone will be held by the walls of tile kerf and do not require such a long clam ing surface. flheupper ends of the cutterlieadsare pivoted to a connecting bar, 11, to which is pivoted one end of a pit-man, 12, which has its free end attached to' a driving shaft, 13, mounted transversely on the frame and rovided with a suitable hand pulley, 14, w ch may receive motion from any suitable power-plant.

The operation of the machine will be readily understood from the drawings and the foregoingdescri tion. Thelargestoneblocks are loaded on tile trucks or cars and the said cars or trucks are then drawn slowly over, the track so as to pass under the cutters which are simultaneously vibrated by means of the driving shaft and the attached'pitman.

As the corner or edge of the stone comesinto contact with the lower end of the first or highest vibrating cutter, the said cutter will bite into the stone so as to start a kerf therein into which abrading material will be fed by hand or by mechanical agents as ma be convenient. As the kerl' is formed am the stone advanced, the cut will be carried to the lowest point of the arc described by the cutter and the continued ,adva'ncc of the stone will then carry it into-contact with the second cutter which will form a deeper cut. As the stone is carried through the machine each cutter will in turn art upon it until it will be out through as it emerges from the range of the cutters.

Inasmuch as each cuttorhcad is carried by a separate shaft ailight connecting bar is su l'licient to transmit the driving power thcrc- .to and there is no necessity i' employing a large heavy beam which would causegreat friction. As the cutters are arranged to make successively deeper cuts it is not necesits sary to employ a large heavy vertically movable frame to feed the saws to the bottom of the kerf and the operation may be carried on continuously as it is not necessary to lift the saws after a stone is divided before starting the Work on the next stone but the stones are fed through the apparatus to the saws Without interruption as will be readily understood from Fig. 1 of the drawings. Furthermore, the cut may be as long as necessary, the length of the out being limited'only by the length of. the track or the length of the stone. As the stone moves in a straight line under the. cutters and the cutters are held rigidly against lateral motion by the cutter heads and the clamping plates, the out through the stone will be straight and it'will not be necessary to true the face of the out after the stone is delivered. The cut may be carried more nearly through the bottomof the stone with my arrangement of cutters without fear of injury to the cutters or the cars than with any machine now known to me and it may be sufficiently flushed tov prevent rust stains so that it will come from under the cutters thoroughly clean. clamping plate over the first cutter covers nearly the entire length of the same, the said cutter will be held very rigidly and will be forced to make. a true cut as far as it goes into the stone, and each cutter is caused to follow in the cut made by the preceding cutter and is in turn held rigidly as far down as possible so that the finished out will be perfectly true.

It will be observed upon reference to Fig. 1

that the are described by each cutter overlaps or intersects the are described by the preceding cutter so that no pocket is formed to collect and hold the abrading material but each cutter-feeds said material to the succeeding cutter so that a small quantity out is made, the wear on t e cutters is reduced to a minimum, and the friction of As the operation is practically overcome so that the machine may be driven rapidly with a small ex enditure of power.

aving thus described my invention, what I claim and desire to secure by Letters-Patent is F- 1. In a stone-cutting machine, the com-- bination of a series of swinging cutters having their lower cutting ends arranged in diiferent horizontal planes, and means for operating said cutters, the are described by each cutter intersecting the arc described by the adjacent cutter.

'2. The combination of a frame having inclined beams, a series of shafts supported on said beams, cutters carried by the ends ol' said shafts, and means for rocking said shafts.

3. The combination of a frame having in clined beams, a series ol shafts journaled on said beams and having cutter heads at their inner ends, a connecting bar pivotally attached t0 the upper end of each cutter head, a pitman pivoted to said connecting bar, means for actuating said pitman, a cutter placed against the inner face of each cutter head, and clamping plates secured to the cutter heads over the cutters. I

4. The combination of the cutter heads, cutters placed against the cutter heads with their lower cutting ends in different horizontal planes, and clamping plates secured to the cutter heads overthe cutters, with the ends of all the clamping dates in substantially the same horizontal plane and their upper ends in successively-dillerent hori. zontal planes corresponding to the positions of the cutters.

In testimony whereof l have signed this specification in the presence of two attesting witnesses.

Eisner A. CHASE.

Witnesses:

Josnrn J. Pnmnns, WILLIAM N. THERIAULT 

